Sound-box.



P. J. MUKAUTZ.

SOUND BOX.

APPLICATION FILED JAN. 25, 1913 1 I Patented Jan. 27, 1914 351 a. Z 1 1%. a

mmwtc 1 6562 JMuicawZz PETER J. MUKAUTZ, OF CHICAGO, ILLINOIS.

SOUND-BOX.

Specification of Letters Patent.

' Patented Jan. 27, 1914..

Application filed January 25, 1913. Serial No. 744,162.

To (ZZZ whom it may concern: Be it known that I, PETER J. MUKAUTZ, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Sound-Boxes, of which the following is a specification.

This invention relates to improvements in sound-boxes for use in Connection with sound recordingor reproducing machines.

The principal object of the invention is to provide a sound-box, which will so actuate v the needle or stylus as it travels over the surface of the record, that clean cut smooth grooves will be traced therein; and in reproducing said record, the tones obtained will be intensified, clear and free from harsh or grating sounds. This is accomplished by confining air or a liquid between a pair of oppositely arranged cupped pistons of different diameters.

Another object of this invention is to provide means for regulating the air or liquid pressure between the pistons, in order to get the best results from the sound-box either in making a record or reproducing the same.

'ith the above and other objects in view as will be understood, the invention will be hereinafter fully described in connection with the accompanying drawings which simply illustrate a preferred embodiment thereof, and the novel "features of the invention will be distinctly pointed out in the appended claims.

In the drawings, Figure 1 is a sectional elevation of a sound-box constructed in accordance with my invention, for use in con nection with a laterally undulating record groove machine. Fig. 2 is a similar view showing a sound-box for an up-and-down record groove machine, and Fig. 3 illustrates a modification of Fig. 1.

Referring to Fig. l of the drawings, 1. represents an annular body which is hollowed out from one end as indicated at 2 t'or inclosing a suitable diaphragm I) supported between a pair of rubber rings t in the usual manner. A cap flange 5 having a central opening 6 is fixed to the end of the body 1 by screws 7, and a flanged funnel S for receivingthe-sound horn, is secured to said cap flange by screws 9. A rubber or similar washer 10 preferably inserted between the face of the cap fiangefi and the flange of the funnel S. The diaphragm 3 is connected at 11 to a piston 12 which is operatively mounted in a bore 13 of the body 1. The piston 12 1s prefe ably cupped out as shown at 1%.

The annular body 1 is recessed at its other end as indicated at 15, and slidably mounted therein IS a piston 16 preferably of larger diameter than the piston 12. The piston 16 is also cupped out as shown at 17. order to retain the piston 16 in the recess 15, the outer face of the piston is turned down to form an annular shoulder, and a flange ring 19 which is fastened to the end of the body 1 serves as an abutment for said annular shoulder. A needle arm 20 is fixed to tlu outer face of the piston 16 and carries a needle 21 as in the ordinary construc tion.

The space between the pistons 12 and 16 v is adapted to contain. air or a liquid, fOI t purpose of forming a cushion to prevent sudden or jerky movements of the pistons, and thereby avoid corresponding movements of the needle 21 or the diaphragm 3. In order to regulate the air or liquid pressure between the pistons 19 and 16 to suit different conditions, and thereby obtain the best records or reproductions, the following means are provided. plunger valve .22 is adjustably screwed into a correspondingly threaded opening '23 in the body 1 and is provided with a knurled head 2%, by means of which the same may be conveniently turned. A vent 25 extends through the plunger valve to admit air or a liquid, or permit the same to escape, and said vent is closed by a plug 26 which is threaded into its outer end.

The sound-box shown in Fig. '2 and suitable for an up-and-down record groove machine is similar to the one already described. except that the sound-box is arranged with its piston 27 ex'tending downwardly and carrying a needle 28 which is adapted to rest on a cylinder record 29. A fiat spring 2:0 is lixed to the lower end ot'the body 31 ot' the sound-box, as indicated at 32, for resiliently supporting the piston 27.

Inthc modification of Fig. 1, lllllStl'tltCtl by Fig. i the diaphragm 33 is connected to a smaller diaphragm 31 by a post 37 and a band ring washer 36 arrangel between the peripheral face of the diaphragm 34 and the flange ring 37 is employed to hold said diaphragm in'position. In this construction lOO ' air' is preferably confined between the diabetween said pistons.

between the latter ton 38.

- mitted by the diaphragm 3 will cause inten-.

sified action 11 'on the needle 21. The air or liquid confine between the'pistons by acting as a'cushion will prevent sudden or jerky vibrations being transmitted to the piston -l6 and then to the needle 21. This 'will produce a deep clean cut record.

It will be-und'erstood from the foregoing, that when a sound-box constructed in accordance'with my invention is used on a reproducing machine; the sounds obtained will be clear, and distinct, and if the piston 12 is made larger than the piston 16, the sounds will be intensified.

In order to regulate the pressure of the air or liquid confinw between the pistons 12 and'l6, theplunge'r valve may be turned inwardly to decrease the space between said pistons .thereby increasing the pressure, or

turned in the reverse direction to decrease- -the pressure. The plug 24: may be removed to admit air or liquid, or allow the same to escape.

Although the construction set forth and described is Well adapted to accomplish the intended purposes, it isto be understood that slight changes may be made without sacriicing any of the advantages or departing from the spirit of the invention. I

Having fully described my invention, what I claim is:

1. In a sound-box, the combination of a body, a diaphragm supported within the body, a piston arranged in spaced relation to the diaphragm, a needle actuated by the piston, and means for decreasing or increasing the volume of the space between said diaphragm and said piston, substantially as described. A

2. In a sound box, the combination of a body, a diaphragm supported within the body, a piston arranged in spaced relation to the diaphragm, a needle actuated by the piston, and an adjustable plunger valve for changing the volume of the space between with a vent, and a removable s'na diaphragm nl's ia 'pi'san, sateen ially as described. 7

3. In asound-box, the combination of a into the body for changing the volume of the space between said diaphragm and said piston, the plunger valve being provided plug for the rent, substantially as described.

d. In a sound-box, the combination. of a body, the body being hollowed out from one end, a diaphragm supported within the hol lowed out portion of the body, a cap fixed to v the hollowed out end of the body, a piston connected to the diaphragm, the'other endlof the body being providedwith a reoessj'eirtending to the piston, a second piston opera; .tively mounted in the recess for receiving. the vibrations of the diaphragm, means for decreasing or increasing the volume of .the

space between said pistons, and a needle actuated by the second mentioned piston,

substantially as described.

5. In a sound-box, the combination oi a body, the body being hollowed out from one end, a diaphragm supported withinthe hollowed out portion of the body, a cap fixed to the hollowed out end of the body, a piston connected to the diaphragm, the other end of the body being provided with a recess extending to the piston, a second piston opera-- tively mounted in the recess for receiving the vibrations of the diaphragm, the body being provided with a threaded, opening leading to said recess, a lunger valve ad ustably screwed into sai threaded opening, the

plunger having a vent ther'ethrough, aremovable plug for closing said vent, and a needle actuated by the second mentioned piston, substantially as described.

6. In a sound-box, the combination of a body, a diaphragm. supported"within the,

body, a piston arranged in spaced relation to the diaphragm, a needle actuated by the piston, an adjustable plunger valve for changing the volume of the space between -said diaphragm and said piston, the plunger valve being provided with a vent, and means for closing and opening the vent, substantially as described. I p i In testimony whereof I afix my signature in presence of two witnessesj PETER J. MUKAUTZ.

Witnesses:

A. SIDLE GEORGE F. GESSNER. 

